Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Long-Term Debt - Long Term Debt (Details) $ in Thousands, kr in Millions	Sep. 26, 2020 USD ($)	Sep. 26, 2020 DKK (kr)	Dec. 31, 2019 USD ($)	Sep. 28, 2019 USD ($)
Debt Instrument
Long-term debt, gross	$ 1,781,354		$ 1,528,146
Unamortized debt issuance costs and original issue discount	(14,001)		(10,774)
Current maturities of long-term debt	(68,485)		(65,846)
Long-term debt net of current maturities	1,698,868		1,451,526
Senior Secured Notes and Senior Notes
Debt Instrument
Long-term debt, gross	$ 1,050,000		800,000
Senior Secured Notes and Senior Notes \| Minimum
Debt Instrument
Effective interest rate, percent	4.63%	4.63%
Senior Secured Notes and Senior Notes \| Maximum
Debt Instrument
Effective interest rate, percent	6.25%	6.25%
Term Loan \| Term Loan
Debt Instrument
Long-term debt, gross	$ 588,507		591,153
Unamortized debt issuance costs and original issue discount				$ (600)
Term Loan \| Term Loan \| Minimum
Debt Instrument
Effective interest rate, percent	1.30%	1.30%
Term Loan \| Term Loan \| Maximum
Debt Instrument
Effective interest rate, percent	2.16%	2.16%
Term Loan \| Finance leases and other financing arrangements
Debt Instrument
Long-term debt, gross	$ 114,656		108,613
Term Loan \| Finance leases and other financing arrangements \| Minimum
Debt Instrument
Effective interest rate, percent	1.25%	1.25%
Term Loan \| Finance leases and other financing arrangements \| Maximum
Debt Instrument
Effective interest rate, percent	5.95%	5.95%
Mortgage notes
Debt Instrument
Long-term debt, gross	$ 28,200	kr 180.0	28,175
Effective interest rate, percent	1.65%	1.65%
Installment notes for stock
Debt Instrument
Long-term debt, gross	$ 0		$ 205
Effective interest rate, percent	0.00%	0.00%